Question
Most proteins have more leucine than histidine residues but more histidine than tryptophan residues. Correlate the number of codons for these three amino acids with this information.
Step 1
For leucine, the codons are UUA, UUG, CUU, CUC, CUA, and CUG. For histidine, the codons are CAU and CAC. For tryptophan, the only codon is UGG. Show more…
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Which amino acid(s) have the most codons? Which amino acid(s) have the fewest codons? Can you think of a reason why multiple codons code for certain amino acids but other amino acids are coded for by very few codons?
Most amino acids are coded for by a set of similar codons. Provide an evolutionary explanation to account for this pattern.
Which amino acids have the most possible codons? Which have the fewest?
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